Tie strap



FIG. 1 is a front perspective view of a tie strap showing my new design;

FIG. 2 is a side elevational view thereof with the opposite side being a mirror image thereof;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a bottom plan view thereof. 

I claim the ornamental design for a tie strap, as shown and described. 